In daily life, having white and neat teeth is everyone's pursuit of health. But at the same time, people often ignore the health and beauty of the gums. The gums of normal people are pink, and a small number of normal people have cloudy melanin deposits on the gum surface. Although the accumulation of melanin has no obvious harm to oral health, this aesthetic effect has a negative impact on people's normal social interaction.
Laser is a major invention of mankind since the 20th century, known as "the fastest knife", "the most accurate ruler", and "the brightest light". Its application in medical treatment is divided into: laser surgery treatment, non-surgical treatment of low-energy laser biostimulation and photodynamic therapy of laser.